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Although no commercial systems are yet available, attosecond lasers are the subject of intense research. DARPA, for instance, launched a $6.9 million project on applications of attosecond pulse generation in August of this year. Katia Moskvitch looks at the technology required to generate these ultrashort laser pulses

Physics gets decidedly weird once structures are created at scales similar to the wavelengths of light, yet these photonic crystals are set to revolutionise many aspects of everyday life, reports Russ Swan